Which of these 8 possessive noun is a plural noun schools penguins woman horses players brothers holters or wings?

The nouns in the question are not possessive nouns.

A possessive noun is indicated by and apostrophe s ('s) added to the end of the Word; or just an apostrophe (') to the end of plural nouns that already end with s.

The plural nouns in the question are:

• schools
• penguins
• horses
• players
• brothers
• Holters (a proper noun is always capitalized)
• wings

The noun 'woman' is a singular form. The plural form is women.

The possessive forms of these nouns are:

• schools' (the schools' schedules)
• penguins' (the penguins' nests)
• horses' (the horses' owner)
• players' (the players' scores)
• brothers' (the brothers' house)
• Holters' (a Holters' dealer)
• wings (the wings' expanse)

The possessive form of the singular noun woman is woman's (the woman's name)

The possessive form of the plural noun women is women's (the women's chatter)